Here is the translation of the text to English:

As the successor to the BM 55 introduced in 1952, the Volvo T 470 Bison was introduced in the autumn of 1959. In some countries, the tractor was also sold under the name BM 470. The difference compared to the Volvo was the engine painted green. The engine had grown to 5.0 liters, and the 73-horsepower tractor was advertised as one of the most powerful tractors in the world. There was no more powerful tractor on the Finnish market. It had 5+1 gears. In terms of technology, the Bison was in many ways simpler than the smaller Boxer.

In 1963, the torque increased. The hydraulics were also developed over the years. The latest models' Terra-Trol hydraulics were already similar to the T 800’s and with a lifting capacity of 1470 kg, it was possible to lift a 4-share plow. There was also a rare four-wheel-drive model of the Bison, the T 471. The same series also included the tractor dumper T 473.

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